2016-08-04, with Sony A7 and Pentax M 28mm f/2.0 Version 1.

The Pentax M 28mm f/2.0 version 1 is actually the Zeiss design of the 28mm Hollywood lens, and as I heard, they even shipped some machinery to Japan to build them. Later (just a little bit) Pentax and Zeiss abandoned their cooperation and Zeiss went with Yashica to reuse the Contax brand. The 15mm Pentax is the only other lens that resulted from that cooperation. What might be interesting about this 28mm, is the Pentax coating on a Zeiss lens.